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Established 2004

Ruddlesden geotechnical

Ruddlesden geotechnical provides ground investigation, geotechnical consultancy and contamination assessment services.

Based in Exeter, but covering the whole of the UK, albeit primarily concentrated in the South West, Ruddlesden geotechnical was formed in 2004.

Ruddlesden geotechnical works on behalf of a wide client base, including local, regional and national housing developers, housing associations, commercial developers, building contractors, structural and civil engineers, architects, building consultants, quantity surveyors, local authorities and private individuals.

Development projects range from single dwellings and extensions to large housing estates, multi-storey flats, offices, industrial units, roads, slopes, schools, hospitals and basements.

The services and projects listed on this web-site provide an indication of those undertaken by Ruddlesden geotechnical, but others are carried out. If your requirement is not readily identifiable on this web-site, please contact us as we may still be able to help you.

  • AGS
  • Constructionline
  • CSCS
  • SMAS
  • ECFC trust

Latest news

Recent projects

  • Latest news

    05 Oct 2026

    Everything you always wanted to know about soakaway testing and groundwater monitoring*

    Everything you always wanted to know about soakaway testing and groundwater monitoring* (*but were afraid to ask).This was the title of a recent lunchtime CPD presentation that Simon and Callum recently gave to a company of drainage and civil engineers. Whilst the pun in the title, taken from a Woody Allen film, might have been lost on many of the audience, its content certainly wasn’t. I am all for sharing what we know, particularly if it takes less than an hour, over lunch, and especially if it helps make all of our lives easier and to the benefit of others. Whilst standing up in front of a room and talking for around 40 minutes isn’t my idea of fun, the benefits are great and many, so we are happy to provide a similar talk to others, if anyone fancies it.    Providing a pizza lunch is optional, but always helps with our availability!

    Everything you always wanted to know about soakaway testing and groundwater monitoring*
    Everything you always wanted to know about soakaway testing and groundwater monitoring*

  • Recent projects

    P20 Groundwater Risk Assessment Demonstrates No Remediation Required

    At a former engineering works near Exeter, elevated levels of polyaromatic hydrocarbons (PAH) and total petroleum hydrocarbons (TPH) were recorded in both the soil and groundwater beneath the site. As screening criteria had been exceeded in the groundwater beneath the site for these contaminants, further assessment was required to ascertain whether the recorded levels of contaminants beneath the site could migrate to off-site receptors, e.g. to a nearby river, and cause unacceptable levels of pollution to the water environment. Remedial targets were calculated using the Environment Agency’s Remedial Targets Worksheet (P20 assessment). In this instance, the recorded values were below the calculated remedial targets and the risk assessment demonstrated that unacceptable pollution was unlikely to occur to controlled waters, as the levels of contaminants on-site were modelled to have diluted by natural attenuation and dispersion processes before reaching the receptor. No further assessment or remedial works were considered to be necessary. This was agreed with and accepted by the Environment Agency.

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  • Recent projects

    TPH, PAH, VOC and SVOC Testing for Contamination Risk Assessments

    Extensive speciated total petroleum hydrocarbon (TPH), polyaromatic hydrocarbon (PAH), volatile organic compound (VOC) and semi-volatile organic compound (SVOC) soil and groundwater testing was undertaken as part of the contamination investigation and assessment for a former railway station and bitumen emulsion depot in Somerset. The locations of the samples and suites of the laboratory testing were targeted, based on the conceptual site model (CSM) and site observations. The laboratory testing was supplemented with in-situ VOC testing using a photo-ionisation detector (PID). The results of the laboratory testing, which was UKAS accredited, were used as part of the human health and controlled waters risk assessments, so that appropriate remedial measures could be provided. All of the analysis and reports were approved by the local authority, NHBC and Environment Agency.

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